9S4 PENTANDRIA DIGYNIA. 



Root perenniah Stem I — 2 feet high, decumbent and erect, te- 

 fete, slightly pubescent, herbaceous in its texture, but not annual 

 as in most of the ot]ier species. Leaves slightly pubescent, with a 

 silky lustre on the upper surface ; petioles 3 — 4 lines long, scarce- 

 ly more than the attenuated base of the leaves, pubescent. Umbels 

 4 — 8, generally solitary, axillary and terminal, many flowered ; flaw* 

 ers small. Corolla white, 2 or 3 times a.^ long as the corpuscle. 

 Leaves of the crown obtuse, very white, scarcely longer than tlie cor- 

 puscle ; hams as long as the corolla. Corpuscle purple at base, 

 >vhite at the summit. 



Grows in rich, wet soils, river swamps ; common along the Ggeecheer 



Flowers May — August. 



14. NiVEA. 



A. foliis ovato-lanceo- I Leaves ovate-lanceo 



latis, glabrinsculis ; uni- late, nearly gl 



^^^*>^^^'->'^^-^ , 



bellis ercctis, lateralibus, I umbels erect, lateral, so* 

 solitariis ; caule siniplici. | litary ; stem simpJ 

 Sp. pi. I. p 1566. 



Pursh, 1. p. ISO. 



Grows on the banks of rivers in gravelly soils, from Virginia to 

 Carolina.. Pursh. 



Flowers Julj — August. 



15. VERTICILL.ATA. 



A. foliis linearibus, re- I Leaves linear, revolute, 

 volutis, verticillatis oppo- | verticillate and opposFtej 

 sitisque ; iimbellis termi- umbels terminal and aX- 

 nalibus axillaribusque ; | illary ; flowers small ; 

 floribus parvulis ; corni- | horns exscrted 

 €ulis excrtis. E. 



Sp. pi. 1. p. 1272. Walt. p. 106. Mich. 1. p. 116. Pursh, 1. p. 183. 



Stem erect, 2—3 feet high, slender. Leaves linear, sometimes 

 crowded near the base of the stem, verticillate near the middle, op- 

 posite towards the summit, and, with the stem, a little hairj. Umbels 

 terminal and axillary, sometimes verticillate, 2—3 or 4 around the 

 Tipper joints. Corolla cinereous. Leaves of the crown truncate, 

 half as long as the corpuscle, white ; horna long, esserted ; corjjusds 

 green at base, white at the summit. 



Grows in rich, light soils, 



?iawer3 May— August* 



.y 



